Helianthus grosseserratus, commonly known as sawtooth sunflower or thick-tooth sunflower,[3] is a perennial sunflower in the family Asteraceae, with a large flowering head (inflorescence).
The plant may reach 3–12 feet (91–366 cm) in height and is found along streams, damp prairies and roadsides in the eastern and central parts of Canada and the United States, primarily in the northern Great Plains and Great Lakes Region, with additional populations as far as Maine, Georgia, and Texas.[3][4] It prefers full sun and moist, fertile loamy soil with high organic content.[5]
The lanceolate leaves are simple and alternate and may reach 4 to 12 inches (10–30 cm) long and from 1 to 4 inches (2–10 cm) wide. The leaves have large teeth along the edges (hence the name, sawtooth) to occasionally nearly entire and the tips are pointed.[6]
The head (formally composite flower) is 3 to 4 inches (7–10 cm) wide with golden-yellow disk flowers that bloom in summer and autumn. The 10-20 yellow ray florets are about 1.5 inches (3.81 cm) long. The fruit is a single achene within a husk.[6]
Various insects, birds and mammals (including cattle) feed on either the plant or its seeds.[5][7]
Native Americans used to treat burns with a poultice made from the flowers.[7]
Referencesedit
^USDA, NRCS (n.d.). "Helianthus grosseserratus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2010-10-11.
^"Helianthus grosseserratus". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online
^"Helianthus grosseserratus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
^ abHilty, John (2020). "Helianthus grosseserratus". Illinois Wildflowers. Retrieved 2008-07-16.
^ abSchilling, Edward E. (2006). "Helianthus grosseserratus". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
^ abHaddock, Mike (2018). "Sawtooth sunflower". Kansas Wildflowers and Grasses.
External linksedit
Photo of herbarium specimen at Missouri Botanical Garden, collected in Wisconsin in 2014
Photo of base of stem, showing formation of roots and rhizomes
January 01, 1970
helianthus, grosseserratus, commonly, known, sawtooth, sunflower, thick, tooth, sunflower, perennial, sunflower, family, asteraceae, with, large, flowering, head, inflorescence, conservation, status, least, concern, iucn, scientific, classification, kingdom, p. Helianthus grosseserratus commonly known as sawtooth sunflower or thick tooth sunflower 3 is a perennial sunflower in the family Asteraceae with a large flowering head inflorescence Helianthus grosseserratus Conservation status Least Concern IUCN 3 1 Scientific classification Kingdom Plantae Clade Tracheophytes Clade Angiosperms Clade Eudicots Clade Asterids Order Asterales Family Asteraceae Genus Helianthus Species H grosseserratus Binomial name Helianthus grosseserratusM Martens 1 Synonyms 2 Helianthus instabilis E Watson The plant may reach 3 12 feet 91 366 cm in height and is found along streams damp prairies and roadsides in the eastern and central parts of Canada and the United States primarily in the northern Great Plains and Great Lakes Region with additional populations as far as Maine Georgia and Texas 3 4 It prefers full sun and moist fertile loamy soil with high organic content 5 The lanceolate leaves are simple and alternate and may reach 4 to 12 inches 10 30 cm long and from 1 to 4 inches 2 10 cm wide The leaves have large teeth along the edges hence the name sawtooth to occasionally nearly entire and the tips are pointed 6 The head formally composite flower is 3 to 4 inches 7 10 cm wide with golden yellow disk flowers that bloom in summer and autumn The 10 20 yellow ray florets are about 1 5 inches 3 81 cm long The fruit is a single achene within a husk 6 Various insects birds and mammals including cattle feed on either the plant or its seeds 5 7 Native Americans used to treat burns with a poultice made from the flowers 7 References edit USDA NRCS n d Helianthus grosseserratus The PLANTS Database plants usda gov Greensboro North Carolina National Plant Data Team Retrieved 2010 10 11 Helianthus grosseserratus The Global Compositae Checklist GCC via The Plant List Note that this website has been superseded by World Flora Online a b Helianthus grosseserratus Germplasm Resources Information Network Agricultural Research Service United States Department of Agriculture Retrieved 2008 07 16 Helianthus grosseserratus County level distribution map from the North American Plant Atlas NAPA Biota of North America Program BONAP 2014 a b Hilty John 2020 Helianthus grosseserratus Illinois Wildflowers Retrieved 2008 07 16 a b Schilling Edward E 2006 Helianthus grosseserratus In Flora of North America Editorial Committee ed Flora of North America North of Mexico FNA Vol 21 New York and Oxford Oxford University Press via eFloras org Missouri Botanical Garden St Louis MO amp Harvard University Herbaria Cambridge MA a b Haddock Mike 2018 Sawtooth sunflower Kansas Wildflowers and Grasses External links editPhoto of herbarium specimen at Missouri Botanical Garden collected in Wisconsin in 2014 Photo of base of stem showing formation of roots and rhizomes Retrieved from https en wikipedia org w index php title Helianthus grosseserratus amp oldid 1160262659, wikipedia, wiki, book, books, library,
